Oxygen permeation flux through 10Sc1YSZ-MnCo 2 O 4 asymmetric membranes prepared by two-step sintering

Oxygen Permeation Studies of Ba0.5Sr0.5Co0.8Fe0.2Ox Asymmetric Membranes

Oxygen Diffusion in Oxide Crystals - Tracing New Routes to Identify the Rate Limiting Step of Oxygen Permeation through Perovskite Membranes

Perovskites are known as mixed electric conductors because they show both electronic (via electron holes) and ionic (via oxygen vacancies) conductivity. Since the electron conductivity is orders of magnitude higher than the ionic one, oxygen vacancy bulk diffusion is regarded as the rate limiting step in oxygen permeation through perovskites. However, for thin perovskite layer the rate of this ...

A New Resistance Model for Interpretation of Gas Permeation Data of Composite and Asymmetric Membranes

In this work a new resistance model has been presented based on that of Henis-Tripodi which can be used for interpretation of gas permeation data in composite and asymmetric membranes. In contrast to the previous works, in this model the fraction of the support layer surface that includes the pores filled with coating material has been taken into account. The influences of the filled pores on s...

mathematical modeling of mass transfer through porous asymmetric polymeric membranes

it is several decades that the application of membrane processes for gas separation has become a great concern within industries. among them, the polymeric membranes of different structures have played the most important role. such application has been widely extended to gas separation and due to the necessity of both; prediction of the behavior of these processes and recognition of the effecti...

Fabrication of asymmetric tubular mixed-conducting dense membranes by a combined spin-spraying and co-sintering process

Mixed-conducting dense ceramic membranes have attracted considerable attention because of their potential application in oxygen separation, oxyfuel combustion and catalytic membrane reaction processes. However, the development of robust mixed-conducting membranes with both high permeability and stability is still a major challenge. In this paper, a crack-free asymmetric tubular membrane made of...